It just occurred to me if virgule trust matrix can implement self-split, in this concrete case, once nodes inside one community decided to kick the spammer out with its supporter but instead of killing them the mother matrix should split and make a copy of trust-matrix, reverse all its certs so that the spammer & hjclub become the Other independent Universe on their own with two offending nodes as root seeds. That's almost like to say goodbye with a good gesture: 'May Force be with you Amen'.